Grey Aliens” & “UFO’s” are real but not what one may think or lead to believe. They have always been here since the beginning.
Here’s my short visual/film-video & scripture knowledge to make this case.Please read on.

Genesis 3:15
And I will put enmity between thee and the woman, and between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.
Ephesians 6:12
For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places.